A valve is provided including a first valve member (64) and a second valve member (66). The first valve member (64) includes a first step and a first orifice (82) adjacent the first step. The second valve member (66) includes a second step and a second orifice (80) adjacent the second step. The second valve member (66) is movable relative to the first valve member (64) between an open position, in which the first orifice is fluidly connected the second orifice, and a closed position, in which the first orifice is substantially fluidly disconnected from the second orifice. The first and second steps are fluidly connected to the second orifice and substantially fluidly disconnected from the first orifice when the second valve member (66) is in the closed position, and the first and second steps are fluidly connected to the first and second orifices when the second valve member (66) is in the open position.